Truly fascinating wikipeada reading on Quarks, just amazing. MP4 recording &nbsp; &nbsp; MP3 recording -- -- Your browser does not support the audio element.

Usefully limited

You are welcome to listen in as I "explain things scientific". I have had great fun with lasers, robots and absorbing Quantum Physics.  Now as a classroom teacher, laid low by heart surgery its time to pick yourself up, dust yourself off and give it all you've got. "And in the mean time keep on doing science"